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ACCOUNTING POLICIES (Details)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
segment
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Property, Plant and Equipment [Line Items]        
Number of reportable segments | segment 2 4    
Property, plant and equipment, net $ 433.1 $ 488.0    
Property, plant and equipment, gross 1,088.4 1,203.0    
Accumulated depreciation 655.3 715.0    
Decrease in retained earnings 785.3 [1] 983.8 $ 941.5 $ 896.8
Cumulative effect adjustment        
Property, Plant and Equipment [Line Items]        
Decrease in retained earnings   2.0    
Retained Earnings [Member] | Cumulative effect adjustment        
Property, Plant and Equipment [Line Items]        
Decrease in retained earnings   2.0    
Tooling        
Property, Plant and Equipment [Line Items]        
Property, plant and equipment, net $ 10.0   $ 12.9  
Property, plant and equipment, gross   94.4    
Accumulated depreciation   $ 81.5    
[1] The number of shares of Common Stock (par value $0.01 per share) outstanding at March 31, 2020 was 101.34.